Upgraded JDK-Version, Spring Boot & Docker for all servies

[demos/kafka/wordcount] / popular

diff --git a/popular b/popular
index 73eec81..5ed4826 160000 (submodule)
--- a/popular
+++ b/popular
@@ -1 +1 @@
-Subproject commit 73eec81b106ad2a145565c8e87bd6fe2a32b617e
+Subproject commit 5ed4826dd2502ce8432ae9417462b771ca351e9b